Foot-margin regulator and indicator attachment for typewriting machines



L. v. LARSEN, DEGD.

M. r. AND E. 0. LARJSEN, EXECUTORS.

FOOT MARGINREGULATOR AND INDICATOR ATTACHMENT FOR TYPEWRITING MACHINES.

APPLICATION FILED NOV. 2. 191$. 1,407,97L v I Patented FebTZI, 1922..

3 SHEETS-SHEET 1. v

Xm vent oz L. LARSEN, DECDQ I m. F. AND E. 0. LARSEN, EXECUTORS. FOOTMARGIN REGULATOR AND INDICATOR ATTACHMENT F 0R TYPEWRITING MACHINES.

APPLICATION FILED Nov. 3. 1919.

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3 SHEETS-SH L. V. LARSEN, DECD. M. F. AND E. 0, LARSEN, EXECUTORS. I 7'FOOT MARGIN REGULATOR AND INDICATOR ATTACHMENT FOR TYPEWRITING MACHINES.

' APPLICATION FILED NOV. 3, 1919- 9 1 71. I I Patented Feb. 21, 1592 3SHEETS SHEET 3. A

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application filed November 3, 1919. Serial No. 335,462.

To all whom it may concern:

Be it known that Laor: V. LARSEN, deceased, late of Paris. in the countyof La mar and State of Texas, did invent a certain new and usefulFoot-Margin Regulator and Indicator Attachment for Typewriting Machines,of which the following is a specification. i

This invention relates to an attachment for typewriting machines,' ofany standard or approved ,make, which attachment may beconvenientlyadapted to the typewriting machine in connection with thecylindrical platen thereof, in such manner that the mechanism of thesaid attachment Wlll reciprocate with the action of the .platen'in itsmovement, and revolution, for indicating, as well as regulating andcontrolling, the number of line spaces that have been negotiated by theplaten, thereby permitting the automatic checking or stopping of themove f the number of lines which ment of revolutions of the platen atany line, or whenever a predetermined number of hne spaces have beenaccomplished, thus permittingthe preserving of any desired margin at thefoot of a sheet of paper, used in t e typewriter.

It is an object of this invention to pro vide a foot margin regulatorand indicator attachment for typewriting machines .by means of which thetypist may determine at any place on the paper sheet being written,

ten or transcribed.

Other objects of theinvention will appear in the following detaileddescription taken" in connection with the accompanying drawings, forminga part of this specification and in which drawings:

' Figure 1 is a top plan of the improved foot margin regulator andindicator attachment showing it applied at a fragment of the carriage ofthe typewriter.

Figure 2 is a longitudinal section through the attachment taken. on theline 2'-2 of Figure 1.

Figure 3 is a cross section through the attachment taken on the line 3-3of Figure 2.

Figure 4 is a detail perspective view of the movable indicator of theattachment.

Figure 5 is a detail perspectiveview' of the pawl or, finger of theattachment.

F1gure 6 is a side elevation of the removable resilient stop which isadapted ferathave been writ- I tachment at any desired position to theis a top plan of a modified form PATENT orrlce.

rams, Taxes, BY MAY FUBEY mnmor LARSEN, or cnrcaoo, rumors, EXEGUTORS.

Specification of Letters latent. P t t '21, 1 22,

of the attachmtnt showing it applied to a fragment of the typewritingmachine. I

Referring more paticularly to the drawe5 ings, wherein like charactersindicate like and corresponding parts throughout the severalviews','t-he platen A of the typewriter structure -B, is made up in theusual manner,

preferably ofa wooden cylindrical core C. the outer surface of which hasmounted thereon a resilient sleeve D forming the cushioning surface overwhich the writing paper passes. The foot margin regulator and indicatorcomprises a metal sleeve 10,.

which is bored to fit about one end of the. core C of the platen'A, asclearly shown in Figure 2 of the drawings, and the outer'surface of thissleeve 10 is provided with a spiral groove 11, forming substantially jsquare threads thereon, which are graduated as illustrated at 12, toconform to the number of double space lines on paper.

The sizes of writing paper most universally in use are the standardletter size, 8% by 11 inches, and the standard legal size 8% by 14inches. In running letter paper through a typewriter, it requires 33double-spaces to move the paper from the time it first appears at thewriting. lineluntil the endis reached on the letter size, while. thelegal size requires 42 double spaces tomove it through double spaces arerequired to bring the paper in position at theFw'riting' line on theplaten, at which time. the writing surface of' the paper first becomesvisible. For the purpose of taking into account these first five doublespaces required to bring thepaper into proper position for writing, thenarrow groove 11 extends back from the first aduation 12 thereon adistanceequal to the" iii e double spaces, to its beginning-point asindicated at 13.

A pawl 14, is provided with a rounded end 15 which rides in the spiralgroove 11,

and co-acts with the graduations 12 to indieate the number oflines,erline spaces that,

.the typewriter'after it first appears at the writing line to the endofthe sheet. Five n. ill

have been passed over the platen A during the operation of thetypewriter. The end oi the pawl 14 remote from the rounded knob or end15 is bifurcated to form spacedears 16 by means of which'the pawl ispi'votally connected'to a pivotally mounted lever 17. A spring 18 iscoiled about the pivot end 19 of the pawl 14, and one end of this springengages the pawl while the other end engages the lever 17 the saidspring tending to urge the pawl 1d outwardly, which outward movement islimited by the downturned end 20 or the lever 17. The lever 17 which issubstantially an inverted U-shape in cross section is pivotally mountedintermediate its ends, hpon a rod 21, which is carried by a suitablebracket 22.

This bracket 22 is attached to the frame of the typewriter carriage B.The spring 23 is coiled about the pin 21 and has one end engaging thelever 17 while the other end engages the typewriter carriage B asclearly shown in Figure 2 of the drawings. This spring 23 tends to urgethe inner or pawl carrying end of the lever down toward the axis of theplaten A The outer end of the lever 17 is preferablycon'caved as shownat 24, so asto provide a finger engaging surface to permit the gradualoperation or rocking ef the levers 17 torelease the pawl 14 to re-setthe attachment attera sheet of paper has been moved through thetypewritingmachine; or to release the platen after its rotation has beenarrested by. the engagement of the pawl 14 with the stop 25.

The stop 25 is preferably constructed of flat spring'metal; issubstantially U-shaped in side elevation as shown in Figure 6 of thedrawings, having the ends of its legs rolled to form eyes 26'. The sidesof the groove 11 are recessed, to provide arc'uate recesses 27, whichreceive therein the rolled eyes 26 of the stopQfi, for connecting thestop to the groove cylinder 16 atany desired point. During the rotationof the platen A and when the pawl it strikes the stop'25, rotation ofthe platen will be arrested, and this stop 25 may beset alongsideany oneof the graduations 12, desired to permit the maintaining of any desiredmargin atthe foot of the papersheet-used in the typewriter. In

I addition to maintaining a uniform foot marginon the successive sheetsof paper passed through the typewriting machine the margin can be variedon the different sheets by i simply setting the spring clip or stop atany numeral corresponding to the desired line; and thus a desiredor-adequate foot margin may be preserved on paper of smaller (llm'en.slons than the standard letter or legal size,

fihe foot margin regulator attachment above described is designed inthis instance;

wjith special reference to the Underwood typewriter, model 5. Howeverthe device is adgwstable to any standard maize of typespiral scaleindicating the line spaces may be used and located parallel "to andconnected with the platen of the typewriting machine in any suitablemanner, such a.

modified formof the invention'being illustrated in Figure 8 of thedrawings. i

In this modified form illustrated iii-Figure 8, the 'cylihder 30 isrotat ably supported at one side of and parallel to the platen E of thetypewriting machino thesaid-cylinder being made'in the same proportionsas the platen E and rotatably supported by a suitable supporting bracket31, which may be attached tothe framework end of the typewritingstructure in any suitable manner.

This cylinder 30 is provided with a spiral groove 32 forming squarethreads 33 which are graduated similar to the raduations 12 and toindicate the various ine spaces of 'paperpassed over the platen E. Apawl 14, rides in the groove [32, and this pawl is pivotally carried bythe pi-votally mounted lever 17. The pawl 14 and level-'17 areconstructedsimilar to thepawl 14 ahd lever 17 illustrated'in thepreferred form of the invention, differing therefrom only in size, whensuch difierences are necessary, to properly proportion them inaccordancewlth t size of the cylinder 30. The lever 17 ispivotallyisupported by suitable brackets 22' upon the frame E of thetypewriter. A I

bevelled'gear 34 is carried at the outerend of the cylinder 30 and itmeshes with a bevelled gear 35.whicl1 is carried by a shaft 36. Thisshaft 36 is rotatably supported i from the frame D and has a bevelledpinion 37 thereon which meshes, with the bevelled gear'38 carried by theplaten E and thus the cylinder 30 is connected'to the, platen E forsynchronous and proportionate rotation therewith. Spring stops similarto the stops. 1

25 are to be 'used in connectionwith. the modified form of cylinder 30.I

Changes in details may be made without able stop adapted for adjustmentand engagement with said pawl for arresting movement of the line-feedmechanism at a predetermined point, and manually operable means formoving said pawl out of engage;

ment with said stop to automatically position said pawl in startingposition. 2. In a foot margin regulator and indicator attachment fortypewriting machines,.'-

including a frame and a rotatable platen ofa cylinder carried at one endof said platen and provided with a. spiral groove and with graduationsthereon, alongside said groove to indicate the line feed of the platen,a haiid lever pivotally carried by the frame of the typewriting machine,an indicator pawl piv-.

otally carried at one end of said hand lever and adapted for engagementin said groove and co-action with said graduations, a spring normallyurging said indicator pawl outwardly, the end of said hand leverbcingdownturned to term a stop for limiting the outward movement ottheindicator pawl.

4. in a foot margin regulator and indi-- cator attachment fortype'writing machines, the combination with a typewriting machineincluding a frame and a rotatable platen, of a cylinder carried at oneend oi said platen and provided with a spiral groove and withgraduations thereon alongside said groove I to indicate the liiiefeedot' the platen, a hand lever pivotally carried by the frame of thetypewriting machine, an indicator pawl pivotally carried at one end ofsaid hand lever and adapted for engagementin said groove and co-actionwith said graduations, a spring normally urging said indicator pawloutwardly, the end of said hand lever being downturned to form a stopfor limiting the outward movement of the indicator pawl, a

spring stop substantially U-shaped in cross section and adapted tofrictionally engage the sides and the groove for connecting the stop andthe cylinder at a predetermined position, said pawl adapted to] engagesaid stop for arresting rotation of the platen.

5. In a foot margin regulator and indicator attachment for typewritingmachines, the combination with a typewriting machine including a frameand a rotatable platen, of acylinder carried at one end of said platenand provided with a spiral groove'andwith 'graduations thereon alongsidesaid groove to indicate the lined eed ofthe platen, a hand leverpivotally carried by the frame of the typewriting machine, an indicatorpawl pivotally carried at one end of said hand lever and' adap'ted forengagement in said groove and co-action with said graduations, a springnormally urging said indicator pawl'outwardly, the end of said handlever being down turned to form a stop for limiting the outward movementof the indicator pawl, a

spring stop substantially U-shaped in cross section, and adapted tofrictionally engage the sides and the groove for connecting the stop andthe cylinder at a predetermined position, said pawl adapted to engagesaid stop for arresting rotation of the platen, said I hand levermovable for moving said indicator pawl out of saidgroove, and a springengaging said hand lever for normally urging it in a pawl returningposition.

6. In a foot margin regulator andindicator attachment for typewritingmachines,

the combination, of a cylinder mounted within the ordinary supportingframe of said typewriter and abutting upon the platen of saidtypewriter, to lie concentric therewith, the exterior surfaces of saidcylinder and platen being in abutting alignment, said cylinder havingspiral grooves therein, a pawl mounted upon the frame of saidtypewriter, andadjustable means positioned within the groove of saidcylinder, and adapted for engagement by said pawl to prevent rotation ofthe platen at a redetermincd point.

- AY FUR'EY LA RSEN, lsmccutriw of estate of lean V. Larsen,

deceased.

ERMA oiivniiin LAiisEN,

-/';nccuto7' of the estate of Leon V. Larsen.

deceased.

